Grain-128AEADv2: Strengthening the Initialization Against Key Reconstruction

Martin Hell; Thomas Johansson; Alexander Maximov; Willi Meier; Hirotaka Yoshida

doi:10.1007/978-3-030-92548-2_2

Grain-128AEADv2: Strengthening the Initialization Against Key Reconstruction

Martin Hell, Thomas Johansson, Alexander Maximov, Willi Meier, Hirotaka Yoshida

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

Abstract

Properties of the Grain-128AEAD key re-introduction, as part of the cipher initialization, are analyzed and discussed. We consider and analyze several possible alternatives for key re-introduction and identify weaknesses, or potential weaknesses, in them. Our results show that it seems favorable to separate the state initialization, the key re-introduction, and the A/R register initialization into three separate phases. Based on this, we propose a new cipher initialization and update the cipher version to Grain-128AEADv2. It can be noted that previously reported and published analysis of the cipher remains valid also for this new version.

Original language	English
Title of host publication	Cryptology and Network Security
Subtitle of host publication	20th International Conference, CANS 2021, Vienna, Austria, December 13-15, 2021, Proceedings
Publisher	Springer
Pages	24-41
ISBN (Electronic)	978-3-030-92548-2
ISBN (Print)	978-3-030-92547-5
DOIs	https://doi.org/10.1007/978-3-030-92548-2_2
Publication status	Published - 2021 Dec 9
Event	20th International Conference, CANS 2021 - Vienna, Austria Duration: 2021 Dec 13 → 2021 Dec 15

Publication series

Name	Lecture Notes in Computer Science
Publisher	Springer
Volume	13099
ISSN (Print)	0302-9743
ISSN (Electronic)	1611-3349

Conference

Conference	20th International Conference, CANS 2021
Country/Territory	Austria
City	Vienna
Period	2021/12/13 → 2021/12/15

Subject classification (UKÄ)

Computer Science

Access to Document

10.1007/978-3-030-92548-2_2

Cite this

Hell, M., Johansson, T., Maximov, A., Meier, W., & Yoshida, H. (2021). Grain-128AEADv2: Strengthening the Initialization Against Key Reconstruction. In Cryptology and Network Security: 20th International Conference, CANS 2021, Vienna, Austria, December 13-15, 2021, Proceedings (pp. 24-41). Article Chapter 2 (Lecture Notes in Computer Science; Vol. 13099). Springer. https://doi.org/10.1007/978-3-030-92548-2_2

@inproceedings{cee56e378ef448f7b405d0b4f092a692,

title = "Grain-128AEADv2: Strengthening the Initialization Against Key Reconstruction",

abstract = "Properties of the Grain-128AEAD key re-introduction, as part of the cipher initialization, are analyzed and discussed. We consider and analyze several possible alternatives for key re-introduction and identify weaknesses, or potential weaknesses, in them. Our results show that it seems favorable to separate the state initialization, the key re-introduction, and the A/R register initialization into three separate phases. Based on this, we propose a new cipher initialization and update the cipher version to Grain-128AEADv2. It can be noted that previously reported and published analysis of the cipher remains valid also for this new version.",

author = "Martin Hell and Thomas Johansson and Alexander Maximov and Willi Meier and Hirotaka Yoshida",

year = "2021",

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language = "English",

isbn = "978-3-030-92547-5",

series = "Lecture Notes in Computer Science",

publisher = "Springer",

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booktitle = "Cryptology and Network Security",

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note = "20th International Conference, CANS 2021 ; Conference date: 13-12-2021 Through 15-12-2021",

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Hell, M , Johansson, T, Maximov, A, Meier, W & Yoshida, H 2021, Grain-128AEADv2: Strengthening the Initialization Against Key Reconstruction. in Cryptology and Network Security: 20th International Conference, CANS 2021, Vienna, Austria, December 13-15, 2021, Proceedings., Chapter 2, Lecture Notes in Computer Science, vol. 13099, Springer, pp. 24-41, 20th International Conference, CANS 2021, Vienna, Austria, 2021/12/13. https://doi.org/10.1007/978-3-030-92548-2_2

Grain-128AEADv2: Strengthening the Initialization Against Key Reconstruction. / Hell, Martin ; Johansson, Thomas; Maximov, Alexander et al.
Cryptology and Network Security: 20th International Conference, CANS 2021, Vienna, Austria, December 13-15, 2021, Proceedings. Springer, 2021. p. 24-41 Chapter 2 (Lecture Notes in Computer Science; Vol. 13099).

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

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T1 - Grain-128AEADv2: Strengthening the Initialization Against Key Reconstruction

AU - Hell, Martin

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N2 - Properties of the Grain-128AEAD key re-introduction, as part of the cipher initialization, are analyzed and discussed. We consider and analyze several possible alternatives for key re-introduction and identify weaknesses, or potential weaknesses, in them. Our results show that it seems favorable to separate the state initialization, the key re-introduction, and the A/R register initialization into three separate phases. Based on this, we propose a new cipher initialization and update the cipher version to Grain-128AEADv2. It can be noted that previously reported and published analysis of the cipher remains valid also for this new version.

AB - Properties of the Grain-128AEAD key re-introduction, as part of the cipher initialization, are analyzed and discussed. We consider and analyze several possible alternatives for key re-introduction and identify weaknesses, or potential weaknesses, in them. Our results show that it seems favorable to separate the state initialization, the key re-introduction, and the A/R register initialization into three separate phases. Based on this, we propose a new cipher initialization and update the cipher version to Grain-128AEADv2. It can be noted that previously reported and published analysis of the cipher remains valid also for this new version.

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